/Engine/Plugins/Animation/DeformerGraph/Source/OptimusCore/Public/OptimusDataDomain.h
A convenience function to compute element counts from a data domain based on execution domain element counts. Current limitation is that it will only return values for zero- or one-dimensional domains, or expressions. If an expression is invalid, or the dimension counts are greater than one, and empty array is returned.
[TOptional](API\Runtime\Core\IO\TOptional)< int32 > GetElementCount ( [TMap](API\Runtime\Core\Containers\TMap)< [FName](API\Runtime\Core\UObject\FName), int32 > InDomainCounts ) const